Using South African sulfide-enriched coal processing waste for amelioration of calcareous soil: A pre-feasibility study

Stander, Helene-Marie; Harrison, Susan T.L.; Broadhurst, Jennifer L.

doi:10.1016/j.mineng.2022.107457

Cited by 3 publications

(3 citation statements)

References 48 publications

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“…In O. sativa, the application of nanoparticles containing zero-valent Fe have been shown to cause minor increases in leaf chlorophyll, whereas nanoparticles containing Fe 2 O 4 and Fe 2 O 4 were not effective, in spite of the increases in plant Fe concentrations observed with the three nanoparticle types; these applications reduced the concentrations of GA and in some cases that of indole-3-acetic acid (Li et al 2021). The possibility that FeS 2 -rich mine coal wastes can ameliorate the nutrition of G. max and other crops in calcareous soils is currently being explored (Stander et al 2022).…”

Section: Effects Of Applying Fe Oxi and Fe Ore Alonementioning

confidence: 99%

“…There are large differences between G. max genotypes regarding Fe uptake e ciency in calcareous soils (Lin et al 1997 ). Many years ago, pyrite (FeS 2 ) was found to be useful for Fe de ciency management (Wallace et al 1976(Wallace et al , 1980, and it has been recently proposed that a pyrite-rich mine coal waste can ameliorate the nutrition of crops in calcareous soils, including G. max (Stander et al 2022).…”

Section: Introductionmentioning

confidence: 99%

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Two Fe mining sub-products and three thiol compounds alleviate Fe deficiency in soybean (Glycine max L.) grown in a calcareous soil in greenhouse conditions

Gheshlaghi

Khorassani²,

Abadı́a³

2022

Plant Soil

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The aim of this work was to test the hypothesis that Fe mining sub-products and thiols can alleviate a moderate Fe-de ciency in the Strategy I species soybean (Glycine max) grown in a calcareous soil in greenhouse conditions. MethodsCombinations of three Fe sources [Fe(III)-EDDHA and two Fe mining sub-products, both of them containing Fe oxides and one FeS 2 ], and three thiols (glutathione, dithiothreitol and thiophenol) were applied in solution to the soil, three times in a 55 day period, and different parameters related to Fe de ciency were measured. The thiol-mediated solubilization of Fe from the Fe mining sub-products was assessed by measuring in the solution total Fe and the reducible Fe pool using an Fe(II) chelator. ResultsApplication of Fe-EDDHA, the two Fe mining sub-products and the three thiols relieved the Fe de ciency symptoms to different extents, increased the Fe concentrations and contents throughout the plant and changed the redox state of leaves and roots, as judged from the changes in reduced and oxidized glutathione, ascorbate and antioxidant enzymes. When using Fe(III)-EDDHA, the addition of thiols led to a better leaf regreening. However, the addition of thiols did not cause further regreening in the case of the Fe mining sub-products, in spite of being able to solubilize Fe from them. ConclusionApplication of Fe-mining sub-products, thiols and the combination of Fe(III)-EDDHA and thiols could be used to alleviate moderate Fe de ciency in G. max grown in a calcareous soil.

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Section: Effects Of Applying Fe Oxi and Fe Ore Alonementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two Fe mining sub-products and three thiol compounds alleviate Fe deficiency in soybean (Glycine max L.) grown in a calcareous soil in greenhouse conditions

Gheshlaghi

Khorassani²,

Abadı́a³

2022

Plant Soil

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“…In addition, there is a great need to reduce cement use through the efficient use of industrial waste products to lessen the greenhouse effect and environmental issues. The research above shows that silty sand soils are extremely variable materials with a reduced "natural" strength capacity, which causes a number of construction challenges when used [29] considered the processing of several minerals and materials found in soils and used by various companies in various parts of the world in 2022.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Impact of Coarse Aggregate Crushing Waste (CACW) in Decreasing Carbon Footprint and Enhancing Geotechnical Properties of Silty Sand Soil

Abdullah,

Abd El Aal,

Al Saiari

et al. 2023

Applied Sciences

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People are forced to use all types of soil, especially bad soils, as infrastructure demands grow. Different procedures must be used to ameliorate these poor soils, which are fragile during building. Natural resource depletion and the rising costs of available materials force us to consider alternative supplies. For several years, researchers have investigated the use of by-products from industry and associated approaches to improve the qualities of various soils. Coarse Aggregate Crushing Waste (CACW) is a waste product that results from the primary crushing of aggregates. Massive amounts of CACW are produced in the business, posing serious issues from handling to disposal. As a result, the widespread use of CACW for diverse purposes has been recommended in the civil engineering profession to address these concerns. Because some natural resources, such as gravel, are nonrenewable, it is vital to decrease their consumption and replace them with recycled, cost-effective, and ecologically acceptable alternatives. This research aimed to investigate the possibility of reusing CACW to improve the geotechnical properties of silty sand (SM) soil available in the Najran region. In this research, soil samples were collected from Najran city and subjected to a variety of lab experiments to determine their characterization. Mixes were designed for a parent soil with a range of percentages of CACW with/without 2% cement. The designed mixes were examined through a set of lab tests to obtain the optimum design for use in road construction. The findings of the tests showed that the optimum dosage is 10% CACW with 2% cement, raising the undrained shear strength of silty sand soil by 323%, CBR by 286%, and P-wave by 180%. The durability tests show that soil mixed with 10% CACW and 2% cement fulfills the requirements and stays within the 14% weight loss limit imposed by the Portland Cement Association (PCA). The microscopic investigation results confirmed the outcomes obtained by macro tests. As a result, the carbon footprint values decrease when CAWA is added, making this treatment approach almost carbon neutral. This study clarifies the long-term effects of CACW on improving the geotechnical characteristics of silty sand soil in the Najran Region of the Kingdom of Saudi Arabia and other comparable soils globally.

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How circular is an extractive economy? South Africa's export orientation results in low circularity and insufficient societal stocks for service-provisioning

Haas,

Virág,

Wiedenhofer

et al. 2023

Resources, Conservation and Recycling

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Using South African sulfide-enriched coal processing waste for amelioration of calcareous soil: A pre-feasibility study

Cited by 3 publications

References 48 publications

Two Fe mining sub-products and three thiol compounds alleviate Fe deficiency in soybean (Glycine max L.) grown in a calcareous soil in greenhouse conditions

Two Fe mining sub-products and three thiol compounds alleviate Fe deficiency in soybean (Glycine max L.) grown in a calcareous soil in greenhouse conditions

Sustainable Impact of Coarse Aggregate Crushing Waste (CACW) in Decreasing Carbon Footprint and Enhancing Geotechnical Properties of Silty Sand Soil

How circular is an extractive economy? South Africa's export orientation results in low circularity and insufficient societal stocks for service-provisioning

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